What is substring of a string?
Does java vector allow null?
How to make a read-only class in java?
When can we say that threads are not lightweight process in java?
What are synchronized methods and synchronized statements in java programming?
What is comparable and comparator interface? List their differences
What is the maximum size of arraylist in java?
What is appletviewer?
Why java is called not pure object oriented language?
Where import statement is used in a java program?
Explain, why the constructor is required in implemented class?
How do you override a private method in java?
What are the principle concepts of oops?